本文整理匯總了TypeScript中core/util/canvas.Context2d.measureText方法的典型用法代碼示例。如果您正苦於以下問題：TypeScript Context2d.measureText方法的具體用法？TypeScript Context2d.measureText怎麽用？TypeScript Context2d.measureText使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類core/util/canvas.Context2d的用法示例。
在下文中一共展示了Context2d.measureText方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: _render
protected _render(ctx: Context2d, indices: number[], {sx, sy, _x_offset, _y_offset, _angle, _text}: TextData): void {
this._sys = []
this._sxs = []
for (const i of indices) {
if (isNaN(sx[i] + sy[i] + _x_offset[i] + _y_offset[i] + _angle[i]) || _text[i] == null)
continue
this._sxs[i] = []
this._sys[i] = []
if (this.visuals.text.doit) {
const text = `${_text[i]}`
ctx.save()
ctx.translate(sx[i] + _x_offset[i], sy[i] + _y_offset[i])
ctx.rotate(_angle[i])
this.visuals.text.set_vectorize(ctx, i)
const font = this.visuals.text.cache_select("font", i)
const {height} = measure_font(font)
const line_height = this.visuals.text.text_line_height.value()*height
if (text.indexOf("\n") == -1){
ctx.fillText(text, 0, 0)
const x0 = sx[i] + _x_offset[i]
const y0 = sy[i] + _y_offset[i]
const width = ctx.measureText(text).width
const [xvalues, yvalues] = this._text_bounds(x0, y0, width, line_height)
this._sxs[i].push(xvalues)
this._sys[i].push(yvalues)
} else {
const lines = text.split("\n")
const block_height = line_height*lines.length
const baseline = this.visuals.text.cache_select("text_baseline", i)
let y: number
switch (baseline) {
case "top": {
y = 0
break
}
case "middle": {
y = (-block_height/2) + (line_height/2)
break
}
case "bottom": {
y = -block_height + line_height
break
}
default: {
y = 0
console.warn(`'${baseline}' baseline not supported with multi line text`)
}
}
for (const line of lines) {
ctx.fillText(line, 0, y)
const x0 = sx[i] + _x_offset[i]
const y0 = y + sy[i] + _y_offset[i]
const width = ctx.measureText(line).width
const [xvalues, yvalues] = this._text_bounds(x0, y0, width, line_height)
this._sxs[i].push(xvalues)
this._sys[i].push(yvalues)
y += line_height
}
}
ctx.restore()
}
}
}示例2: _calculate_text_dimensions
protected _calculate_text_dimensions(ctx: Context2d, text: string): [number, number] {
const {width} = ctx.measureText(text)
const {height} = get_text_height(this.visuals.text.font_value())
return [width, height]
}示例3: _calculate_text_dimensions
_calculate_text_dimensions(ctx: Context2d, text) {
const { width } = ctx.measureText(text);
const { height } = get_text_height(this.visuals.text.font_value());
return [width, height];
}